Wireless Communication Interview Questions & Answers

Wireless communication can be defined as; it is the connection as well as communication between several devices using wireless signals. Wireless communications are different types which include satellite, Wi-Fi, mobile, and IR. In India, there are a lot of leading & modern companies for wireless communication engineering jobs like senior lead; wireless design, RF, & the students must have basic knowledge on LTE, programming languages like C, C++, and otherwise MATLAB. Here we have listed some wireless communication interview questions & answers in an efficient technique.

Wireless Communication Interview Questions & Answers

The following wireless communication Interview Questions with answers are very helpful for electronics and communication students to clear the technical round in an interview. The wireless communication interview questions are collected from different fields of wireless technologies.

1). What is the wireless communication concept?

A). Wireless communication is the transfer of information between two or more points that are not connected by any physical medium. Wireless communications can be via Radio communication, Microwave communication, Light, Visible and Infrared communication.

2). What do you mean by frequency reuse?

A). Each cellular Base Station is allocated a group of radio channels to be used. These radio channels can be used by another base station which is at a suitable distance away from it.

3). What do you mean by Handoff?

A). When a mobile moves into a different cell while a conversation is in progress, the Mobile Switching Center automatically transfers the call to a new channel belonging to the new Base Station. Types of handoffs are Hard Handoff and Soft Handoff.

4). What do you mean by Mobile Station Subsystem?

A). It includes mobile equipment which refers o a physical terminal such as a telephone which includes the radio trans-receiver signal processor and the Subscriber Identity Module

5). What do you mean by Base Station Subsystem?

A). It consists of one or more BTS and BSC. Each BTS is related to one cell which includes an antenna, a video trans-receiver, and a link to BSC. BSC controls multiple BTS units, manages the handoffs of the mobiles, and controls the paging.

6). What do you mean by Network and Switching Subsystem?

A). It controls handoffs between cells in different BSSs, authenticates users, validates and maintains their accounts. It is mainly supported by four databases like Home Location Register., Visitor Location Register, Authentication Center, and Equipment Identity Register.

7). What do you mean by Ad-hoc networks?

A). Ad-hoc networks are those wirelesses Local Area Network that does not require any infrastructure to work. Each node can communicate directly with other nodes. So, no access point is required.

8). What are the different types of transmission impairment?

A). When the received signal is not as same as the transmitted signal then it is known as Transmission impairment. Three different types of transmission impairment are Attenuation, Noise, and Delay Distortion.

9). What is the difference between 3G and 4G?

A). 3G stands for a 3rd generation as it is just that in terms of the evolutionary path of the mobile phone industry.

4G means 4th generation. This is a set of standard that is being developed as a future successor of 3G in the very near future.

4G speeds are meant to exceed that of 3G.

3G uses the technique of circuit switching while 4G uses the technique of packet switching.

10). Which multiple access technique is used by second-generation cellular systems?

A). TDMA/FDD and CDMA/FDD

11) The CDMA standard of the second-generation network is?

A). IS-95

12). Popular 2G CDMA standard IS-95 is also known as

A). CdmaOne

13). How many users or voice channels are supported for each 200 KHz channel in GSM?

A). 8

14). How many voice channels are supported for each 30 kHz radio channel in IS-136?

A). 3

15). How many users are supported in IS-95 for each 1.25 MHz?

A). Sixty-four

16). Which modulation technique is used by GSM?

A). GMSK

17). IS-95 uses which modulation technique?

A). BPSK

18). IS-136 uses which modulation technique?

A). π/4 DQPSK

19). The disadvantages of 2G standards?

A) Limited Internet Browsing

20). GSM (Global System for Mobile) was earlier also known as

A) Group Special Mobile

21). 2G CDMA standard, IS-95, was proposed by which company?

A) Qualcomm

22). Which 2G standard is used in Japan?

A) PDC

23). The 2G GSM technologies use a carrier separation of

A) 200 kHz

Thus, this is all about interview questions and answers for engineers in the field of wireless communication. Every company pays well for engineering jobs for the future of their corporation. One should look forward to both technical as well as standard interview questions at a job interview. Generally, technical questions will relate to the responsibilities that are necessary for the job. And always make sure that every student also takes the time to imagine some of the engineering job interview questions and answers they may be asked.